Question

question 1 michael wants to test the effect that different concentrations of stomach acid will have on the dissolution of a particular kind of oral medication. as he sets up and completes his experiment, which of the following experimental designs would be most likely to help him answer his question? a. allow several pills to soak in different amounts of acid of a single concentration and then measure the amount of dissolution on each. b. after allowing several pills to be exposed to different acid concentrations, measure the surface area of each that is dissolved. c. after allowing a pill to be exposed to one acid concentration, place it in different acid concentrations, and then measure the surface area that is dissolved. d. prepare solutions of different acid concentrations, measure 50 milliliters of each into different beakers, and place different types of pills of the same mass into the beakers.

Explanation:

Michael wants to test the effect of different stomach - acid concentrations on the dissolution of a particular oral medication. Option A tests different amounts of acid of a single concentration, not different concentrations. Option C tests a single pill in different acid concentrations in sequence which may have confounding factors. Option D uses different types of pills instead of the same type. Option B exposes several pills of the same type to different acid concentrations and measures the dissolved surface area, which is the most appropriate experimental design for his question.

Answer:

B. After allowing several pills to be exposed to different acid concentrations, measure the surface area of each that is dissolved.